A gloss meter is a device used to measure the gloss of a surface, which is a measure of its ability to reflect light. Gloss is an important property of many materials, including paint, plastic, and metal, and is used to evaluate the quality and appearance of the surface. Gloss meters work by measuring the amount of light reflected from the surface at a specific angle, typically 60° or 85°. The readings from the gloss meter are used to determine the surface's gloss level, which is usually reported as a percentage of the amount of light reflected. Gloss meters are widely used in the paint and coatings industry, in printing and packaging, and in quality control applications to ensure that surfaces meet specific gloss requirements.
 
To use a gloss meter:
 
Clean and dry the surface of the material you want to test.
Place the gloss meter on the surface of the material and ensure that it is properly aligned with the surface.
Turn on the gloss meter and follow the manufacturer's instructions to take a measurement.
The measurement is typically displayed as a numerical value representing the gloss level of the material, which can range from 0 (least glossy) to 100 (most glossy).
Repeat the measurement at several locations on the surface of the material to obtain an average value.
 
Note: The measurement angle and the type of light source used by the gloss meter can affect the results, so it is important to follow the manufacturer's instructions and use the correct settings for the specific material you are testing.